Improvement in machines



glatten tatrs @anni @fitta DANIEL FLYNN, OF HARTFORD, CONNECTICUT.

Letters Patent No. 67,520, dated August 6, 1867.

IMPROVEMENT IN MACHINERY FOR CUTTING KEY-SEATS.

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TO ALL WIIOM IT MAY CONCERN:

Be it known that I, DANIEL FLYNN, of Hartford, in the county of Hartford, and State of Connecticut, have invented a new and useful Machine for Cutting Key-Seats; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings and to the letters of reference marked thereon.

Figure l represents a side .viewVV of the machine.

Figure 2 shows the tool-shaft detached, and thexinterior arrangements for movingl the tool, viewed from the side opposite that shown in iig. 1.

Figure 3 represents a top view of the machine.

Figure 4 shows a bottom view of the tool-shaft detached.

Like letters in the several figures indicate like parts.

The construction of the machine is as follows: A A are two circular chucks, each having three movable jaws B B B, which are simultaneously moved in and out from the centre by means of the worms C C. These worms operate an interior wheel, which is furnished with slots cut in its face eccentric to the centre of the circle, in which pins fined to the jawsB by the nuts D slide, whereby the jaws are simultaneously moved by turning the worms C. The jaws B may also be moved ont and in by any other common mechanical contrivance that will move them simultaneously equal distances. Through the centre of the circular chucks A A passes the toolshnft E, which' slides freely in the direction of its length, but is prevented from turning by a feather on the chuck A working in a slot, c, inthe shaft. At the end E it is hollow, and furnished with a nut, through which the screw F operated by the crank G passes. The screw F is fitted into a fixed collar, H, supported by the two arms I I attached to the chuck A. -The shaft E carries the tool K, which passes through the shaft. The top of the tool is made forked, or has a deep notch cut into it,l through which the slide L passes to move the tool up and down and give it the proper feed." AThe slide L works in a. properly-shaped recess in the shaft'E, and is moved by means of the pin p, which passes through the slot m in the shaft E. The slide L is provided with an inclined edge, a a, and a groove, b Za, parallel to it, in which the pin 1* slides, by whichthe tool K is moved up and down when the slide L is pushed backward and forward. Passing through the chucks-A and A are t'wo screws s and s for operating the pimp, which is attached to the slide L. To one of the jaws of the chuck A is attached a. regulatingscrew, N, by which that jaw is moved, independently of the others, out or in, as may be' desired, to givev the proper draught to the key-seat, so that the key maybe as tapering as desired. M M are stops to regulate the distance the shaft E is moved when'the machine is in operation.

The operation df my invention is as follows: After regulating the screw N for the desired draught of the key-seat, the chuck A is removed. The shaft E is then passed through the aperture inthe hub of the wheel or other article in which the key-seat is to be cut and the chuck A replaced. The jaws B are placed inside the opening of the hub and pressed up firmly against it by means of the worms C. The shaft E, which carries the cutting-tool K, is then worked backward and forward by means of the crank G and screw F. The screw s is placed so that when the cutter has passed through the work to be eut it will strike the pin p, push backthe slide L, and raise the tool tothe proper position for passing back over the work. (This is the position shown is the drawings.) The screw s is placed so that when the cutter is drawn back to the proper distance it will strike the pin p, and by advancing the slide L force the tool down again to the proper position for cutting. .At each successive cut the screw s is alittle advanced, to give a feed to the tool K downward, and cause it to cut deeper The tool. can also be made to cnt in the opposite direction, in which case the functionsof the screws s and s' are reversed, and the shaft,as described, is turned end for end. The stops M M areset the distance apart that it is desired the tool K should move. .This machine is attached to the inside surface of the hub and is guaged and regulated by it, so as to cut the key-seat true with the central axis ot` the hub or other article to be eut.

Claims.

What I claim as my invention, and desire to secure by Letters Patent, is

1. I claim the combination of the centi-ing chucks A A', the too1shaft E, the tool K, the slide L, andthe screws s and s', or their equivalents, for the purposes of a machine for cutting l:ey-seats, substantially as herein described.

2. I claim the slide L, in combination with the vscrews s and s', and reciprocating-shaft E, for raising and feedingthe tool K, substantially as herein described.

DANIEL FLYNN.

Witnesses:

Lnvr Woennousn, THEO. G. ELLIS. 

